The finance industry is being pushed by regulation to register most of its operations with timestamps legally traceable to a Coordinated Universal Time reference with up to 1 ms error. This poses a challenge for the sector, since the most commonly used solutions to provide time in the industry might not comply with the requirements. While the typical network-based solutions might not be able to reach the needed level of time accuracy when used in large networks, the satellite-based options can easily be subject to external interference or attacks. Additionally, both approaches struggle when traceability to legal time is required. Our proposed service consists in offering the performance of White Rabbit time transfer over commercial optical fiber networks, the accuracy of atomic clocks continuously compared to the legal time reference, and the resiliency of a client node with holdover capabilities better than 1.5 ms after 24 hours. This design has already been put into place to provide a time service to the Spanish stock market operator. Our approach is easily scalable and can be used to provide a future-proof time as a service solution to a large number of customers from a single location.

中文翻译：

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基于白兔的时间即服务金融应用

金融业正在受到监管的推动，以注册其大部分操作，其时间戳在法律上可追溯到协调世界时参考，误差高达 1 毫秒。这给该行业带来了挑战，因为行业中最常用的提供时间的解决方案可能不符合要求。虽然典型的基于网络的解决方案在大型网络中使用时可能无法达到所需的时间精度水平，但基于卫星的解决方案很容易受到外部干扰或攻击。此外，当需要可追溯至法定时间时，这两种方法都很困难。我们建议的服务包括通过商业光纤网络提供白兔时间传输的性能，与法定时间参考相比，原子钟的准确性不断提高，24 小时后保持能力优于 1.5 毫秒的客户端节点的弹性。这种设计已经到位，为西班牙股票市场运营商提供时间服务。我们的方法易于扩展，可用于从单一位置向大量客户提供面向未来的时间即服务解决方案。